305 7 MOTIVATIONAL FACTORS IN A MENTAL HEALTH GAME text, and an editing style focused on zooming in or out of the pictures. Based on a pilot study (n = 22) we slightly adapted the two trailers to further improve attractiveness and enhance their differences (for more details, see Poppelaars, Wols, et al., 2018). These two 1-minute trailers were filled with two different messages: a mental health message or an entertainment message. Each message consisted of five sentences, with the first sentence in both messages introducing the game as appealing. The mental health message emphasized beneficial effects of the game on players’ mental health and included the following sentences: “perfect for a single marathon playthrough”, “learn to manage stress more efficiently”, “therapeutic insights for emotional mastery”, “both challenging and relaxing”, and “recommended by games for mental health”. The entertainment message emphasized the entertainment value of the game and that the game was highly acclaimed. The following sentences were included in the entertainment message: “a game you must play”, “think outside the box to solve intricate puzzles”, “9/10 Polygon 5/5 Touch Arcade”, “almost impossibly gorgeous”, and “iPad game of the year”. By using two experimental conditions, we counterbalanced between participants which trailer design (i.e., the detailed or abstract trailer) contained the mental health message and which trailer design contained the entertainment message. Participants were randomly assigned to one of the two conditions. In condition 1, participants (n = 66) saw the detailed trailer with the mental health messages (see https://www.youtube. com/watch?v=N17yM7c2gu4) and the abstract trailer with the entertainment messages (see https://www.youtube.com/watch?v=eXm0_N_h02w). In condition 2, participants (n = 63) saw the abstract trailer with the mental health messages (see https://www.youtube.com/ watch?v=D5xOB3OFPxQ) and the detailed trailer with the entertainment messages (see https://www. youtube.com/watch?v=UX9fYmWwb24). In both conditions, the trailers were shown in random order.
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